Arc'teryx Atom Vest M Optimal (>20000 mm) the 4D MAG S drops

the 4D MAG S drops you into a bigger

Breathable 20D recycled nylon liner helps regulate temperature and is soft and comfortable next to the skin

With its efficient ventilation

Snow tools/shovel pocket with sleeves

Comfort Flex ankle straps

Arc'teryx Atom Vest M Optimal (>20000 mm) the 4D MAG S dropsThe latest generation of our lightweight Atom vest brings stretch performance, improved thermoregulation, and added durability. Streamlined and versatile, it shines as a midlayer or standalone during mid to high output activities. Fortius Air 20 nylon liner is lightweight, breathable, and made with recycled content Stretch synthetic insulation is breathable, warm, and light, adds freedom of movement, and is made with recycled content Lightweight